Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/mips/adm5120/obio.c
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1 /* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD: releng/8.1/sys/mips/adm5120/obio.c 183173 2008-09-19 04:10:09Z imp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bus.h> 44 #include <sys/interrupt.h> 45 #include <sys/kernel.h> 46 #include <sys/module.h> 47 #include <sys/rman.h> 48 #include <sys/malloc.h> 49 50 #include <machine/bus.h> 51 52 #include <mips/adm5120/adm5120reg.h> 53 #include <mips/adm5120/obiovar.h> 54 55 /* MIPS HW interrupts of IRQ/FIQ respectively */ 56 #define ADM5120_INTR 0 57 #define ADM5120_FAST_INTR 1 58 59 /* Interrupt levels */ 60 #define INTR_IRQ 0 61 #define INTR_FIQ 1 62 63 int irq_priorities[NIRQS] = { 64 INTR_IRQ, /* flash */ 65 INTR_FIQ, /* uart0 */ 66 INTR_FIQ, /* uart1 */ 67 INTR_IRQ, /* ahci */ 68 INTR_IRQ, /* unknown */ 69 INTR_IRQ, /* unknown */ 70 INTR_IRQ, /* unknown */ 71 INTR_IRQ, /* unknown */ 72 INTR_IRQ, /* unknown */ 73 INTR_IRQ, /* admsw */ 74 INTR_IRQ, /* unknown */ 75 INTR_IRQ, /* unknown */ 76 INTR_IRQ, /* unknown */ 77 INTR_IRQ, /* unknown */ 78 INTR_IRQ, /* unknown */ 79 INTR_IRQ, /* unknown */ 80 INTR_IRQ, /* unknown */ 81 INTR_IRQ, /* unknown */ 82 INTR_IRQ, /* unknown */ 83 INTR_IRQ, /* unknown */ 84 INTR_IRQ, /* unknown */ 85 INTR_IRQ, /* unknown */ 86 INTR_IRQ, /* unknown */ 87 INTR_IRQ, /* unknown */ 88 INTR_IRQ, /* unknown */ 89 INTR_IRQ, /* unknown */ 90 INTR_IRQ, /* unknown */ 91 INTR_IRQ, /* unknown */ 92 INTR_IRQ, /* unknown */ 93 INTR_IRQ, /* unknown */ 94 INTR_IRQ, /* unknown */ 95 INTR_IRQ, /* unknown */ 96 }; 97 98 99 #define REG_READ(o) *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(ADM5120_BASE_ICU + (o))) 100 #define REG_WRITE(o,v) (REG_READ(o)) = (v) 101 102 static int obio_activate_resource(device_t, device_t, int, int, 103 struct resource *); 104 static device_t obio_add_child(device_t, int, const char *, int); 105 static struct resource * 106 obio_alloc_resource(device_t, device_t, int, int *, u_long, 107 u_long, u_long, u_int); 108 static int obio_attach(device_t); 109 static int obio_deactivate_resource(device_t, device_t, int, int, 110 struct resource *); 111 static struct resource_list * 112 obio_get_resource_list(device_t, device_t); 113 static void obio_hinted_child(device_t, const char *, int); 114 static int obio_intr(void *); 115 static int obio_probe(device_t); 116 static int obio_release_resource(device_t, device_t, int, int, 117 struct resource *); 118 static int obio_setup_intr(device_t, device_t, struct resource *, int, 119 driver_filter_t *, driver_intr_t *, void *, void **); 120 static int obio_teardown_intr(device_t, device_t, struct resource *, 121 void *); 122 123 static int 124 obio_probe(device_t dev) 125 { 126 127 return (0); 128 } 129 130 static int 131 obio_attach(device_t dev) 132 { 133 struct obio_softc *sc = device_get_softc(dev); 134 int rid; 135 136 sc->oba_mem_rman.rm_type = RMAN_ARRAY; 137 sc->oba_mem_rman.rm_descr = "OBIO memeory"; 138 if (rman_init(&sc->oba_mem_rman) != 0 || 139 rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START, 140 OBIO_MEM_START + OBIO_MEM_SIZE) != 0) 141 panic("obio_attach: failed to set up I/O rman"); 142 143 sc->oba_irq_rman.rm_type = RMAN_ARRAY; 144 sc->oba_irq_rman.rm_descr = "OBIO IRQ"; 145 146 if (rman_init(&sc->oba_irq_rman) != 0 || 147 rman_manage_region(&sc->oba_irq_rman, 0, NIRQS-1) != 0) 148 panic("obio_attach: failed to set up IRQ rman"); 149 150 /* Hook up our interrupt handler. */ 151 if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 152 ADM5120_INTR, ADM5120_INTR, 1, 153 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 154 device_printf(dev, "unable to allocate IRQ resource\n"); 155 return (ENXIO); 156 } 157 158 if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, obio_intr, NULL, 159 sc, &sc->sc_ih))) { 160 device_printf(dev, 161 "WARNING: unable to register interrupt handler\n"); 162 return (ENXIO); 163 } 164 165 /* Hook up our FAST interrupt handler. */ 166 if ((sc->sc_fast_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 167 ADM5120_FAST_INTR, ADM5120_FAST_INTR, 1, 168 RF_SHAREABLE | RF_ACTIVE)) == NULL) { 169 device_printf(dev, "unable to allocate IRQ resource\n"); 170 return (ENXIO); 171 } 172 173 if ((bus_setup_intr(dev, sc->sc_fast_irq, INTR_TYPE_MISC, obio_intr, 174 NULL, sc, &sc->sc_fast_ih))) { 175 device_printf(dev, 176 "WARNING: unable to register interrupt handler\n"); 177 return (ENXIO); 178 } 179 180 /* disable all interrupts */ 181 REG_WRITE(ICU_ENABLE_REG, ICU_INT_MASK); 182 183 bus_generic_probe(dev); 184 bus_enumerate_hinted_children(dev); 185 bus_generic_attach(dev); 186 187 return (0); 188 } 189 190 static struct resource * 191 obio_alloc_resource(device_t bus, device_t child, int type, int *rid, 192 u_long start, u_long end, u_long count, u_int flags) 193 { 194 struct obio_softc *sc = device_get_softc(bus); 195 struct obio_ivar *ivar = device_get_ivars(child); 196 struct resource *rv; 197 struct resource_list_entry *rle; 198 struct rman *rm; 199 int isdefault, needactivate, passthrough; 200 201 isdefault = (start == 0UL && end == ~0UL && count == 1); 202 needactivate = flags & RF_ACTIVE; 203 passthrough = (device_get_parent(child) != bus); 204 rle = NULL; 205 206 if (passthrough) 207 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, 208 rid, start, end, count, flags)); 209 210 /* 211 * If this is an allocation of the "default" range for a given RID, 212 * and we know what the resources for this device are (ie. they aren't 213 * maintained by a child bus), then work out the start/end values. 214 */ 215 if (isdefault) { 216 rle = resource_list_find(&ivar->resources, type, *rid); 217 if (rle == NULL) 218 return (NULL); 219 if (rle->res != NULL) { 220 panic("%s: resource entry is busy", __func__); 221 } 222 start = rle->start; 223 end = rle->end; 224 count = rle->count; 225 } 226 227 switch (type) { 228 case SYS_RES_IRQ: 229 rm = &sc->oba_irq_rman; 230 break; 231 case SYS_RES_MEMORY: 232 rm = &sc->oba_mem_rman; 233 break; 234 default: 235 printf("%s: unknown resource type %d\n", __func__, type); 236 return (0); 237 } 238 239 rv = rman_reserve_resource(rm, start, end, count, flags, child); 240 if (rv == 0) { 241 printf("%s: could not reserve resource\n", __func__); 242 return (0); 243 } 244 245 rman_set_rid(rv, *rid); 246 247 if (needactivate) { 248 if (bus_activate_resource(child, type, *rid, rv)) { 249 printf("%s: could not activate resource\n", __func__); 250 rman_release_resource(rv); 251 return (0); 252 } 253 } 254 255 return (rv); 256 } 257 258 static int 259 obio_activate_resource(device_t bus, device_t child, int type, int rid, 260 struct resource *r) 261 { 262 263 /* 264 * If this is a memory resource, track the direct mapping 265 * in the uncached MIPS KSEG1 segment. 266 */ 267 if (type == SYS_RES_MEMORY) { 268 void *vaddr; 269 270 vaddr = (void *)MIPS_PHYS_TO_KSEG1((intptr_t)rman_get_start(r)); 271 rman_set_virtual(r, vaddr); 272 rman_set_bustag(r, MIPS_BUS_SPACE_MEM); 273 rman_set_bushandle(r, (bus_space_handle_t)vaddr); 274 } 275 276 return (rman_activate_resource(r)); 277 } 278 279 static int 280 obio_deactivate_resource(device_t bus, device_t child, int type, int rid, 281 struct resource *r) 282 { 283 284 return (rman_deactivate_resource(r)); 285 } 286 287 static int 288 obio_release_resource(device_t dev, device_t child, int type, 289 int rid, struct resource *r) 290 { 291 struct resource_list *rl; 292 struct resource_list_entry *rle; 293 294 rl = obio_get_resource_list(dev, child); 295 if (rl == NULL) 296 return (EINVAL); 297 rle = resource_list_find(rl, type, rid); 298 if (rle == NULL) 299 return (EINVAL); 300 rman_release_resource(r); 301 rle->res = NULL; 302 303 return (0); 304 } 305 306 static int 307 obio_setup_intr(device_t dev, device_t child, struct resource *ires, 308 int flags, driver_filter_t *filt, driver_intr_t *handler, 309 void *arg, void **cookiep) 310 { 311 struct obio_softc *sc = device_get_softc(dev); 312 struct intr_event *event; 313 int irq, error, priority; 314 uint32_t irqmask; 315 316 irq = rman_get_start(ires); 317 318 if (irq >= NIRQS) 319 panic("%s: bad irq %d", __func__, irq); 320 321 event = sc->sc_eventstab[irq]; 322 if (event == NULL) { 323 error = intr_event_create(&event, (void *)irq, 0, irq, 324 (mask_fn)mips_mask_irq, (mask_fn)mips_unmask_irq, 325 NULL, NULL, "obio intr%d:", irq); 326 327 sc->sc_eventstab[irq] = event; 328 } 329 else 330 panic("obio: Can't share IRQs"); 331 332 intr_event_add_handler(event, device_get_nameunit(child), filt, 333 handler, arg, intr_priority(flags), flags, cookiep); 334 335 irqmask = 1 << irq; 336 priority = irq_priorities[irq]; 337 338 if (priority == INTR_FIQ) 339 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask); 340 else 341 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask); 342 343 /* enable */ 344 REG_WRITE(ICU_ENABLE_REG, irqmask); 345 346 return (0); 347 } 348 349 static int 350 obio_teardown_intr(device_t dev, device_t child, struct resource *ires, 351 void *cookie) 352 { 353 struct obio_softc *sc = device_get_softc(dev); 354 int irq, result; 355 uint32_t irqmask; 356 357 irq = rman_get_start(ires); 358 if (irq >= NIRQS) 359 panic("%s: bad irq %d", __func__, irq); 360 361 if (sc->sc_eventstab[irq] == NULL) 362 panic("Trying to teardown unoccupied IRQ"); 363 364 irqmask = 1 << irq; /* only used as a mask from here on */ 365 366 /* disable this irq in HW */ 367 REG_WRITE(ICU_DISABLE_REG, irqmask); 368 369 result = intr_event_remove_handler(cookie); 370 if (!result) { 371 sc->sc_eventstab[irq] = NULL; 372 } 373 374 return (result); 375 } 376 377 static int 378 obio_intr(void *arg) 379 { 380 struct obio_softc *sc = arg; 381 struct intr_event *event; 382 uint32_t irqstat; 383 int irq; 384 385 irqstat = REG_READ(ICU_FIQ_STATUS_REG); 386 irqstat |= REG_READ(ICU_STATUS_REG); 387 388 irq = 0; 389 while (irqstat != 0) { 390 if ((irqstat & 1) == 1) { 391 event = sc->sc_eventstab[irq]; 392 if (!event || TAILQ_EMPTY(&event->ie_handlers)) 393 continue; 394 395 /* TODO: pass frame as an argument*/ 396 /* TODO: log stray interrupt */ 397 intr_event_handle(event, NULL); 398 } 399 400 irq++; 401 irqstat >>= 1; 402 } 403 404 return (FILTER_HANDLED); 405 } 406 407 static void 408 obio_hinted_child(device_t bus, const char *dname, int dunit) 409 { 410 device_t child; 411 long maddr; 412 int msize; 413 int irq; 414 int result; 415 416 child = BUS_ADD_CHILD(bus, 0, dname, dunit); 417 418 /* 419 * Set hard-wired resources for hinted child using 420 * specific RIDs. 421 */ 422 resource_long_value(dname, dunit, "maddr", &maddr); 423 resource_int_value(dname, dunit, "msize", &msize); 424 425 426 result = bus_set_resource(child, SYS_RES_MEMORY, 0, 427 maddr, msize); 428 if (result != 0) 429 device_printf(bus, "warning: bus_set_resource() failed\n"); 430 431 if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 432 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 433 if (result != 0) 434 device_printf(bus, 435 "warning: bus_set_resource() failed\n"); 436 } 437 } 438 439 static device_t 440 obio_add_child(device_t bus, int order, const char *name, int unit) 441 { 442 device_t child; 443 struct obio_ivar *ivar; 444 445 ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO); 446 if (ivar == NULL) { 447 printf("Failed to allocate ivar\n"); 448 return (0); 449 } 450 resource_list_init(&ivar->resources); 451 452 child = device_add_child_ordered(bus, order, name, unit); 453 if (child == NULL) { 454 printf("Can't add child %s%d ordered\n", name, unit); 455 return (0); 456 } 457 458 device_set_ivars(child, ivar); 459 460 return (child); 461 } 462 463 /* 464 * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource 465 * Provides pointer to resource_list for these routines 466 */ 467 static struct resource_list * 468 obio_get_resource_list(device_t dev, device_t child) 469 { 470 struct obio_ivar *ivar; 471 472 ivar = device_get_ivars(child); 473 return (&(ivar->resources)); 474 } 475 476 static device_method_t obio_methods[] = { 477 DEVMETHOD(bus_activate_resource, obio_activate_resource), 478 DEVMETHOD(bus_add_child, obio_add_child), 479 DEVMETHOD(bus_alloc_resource, obio_alloc_resource), 480 DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource), 481 DEVMETHOD(bus_get_resource_list, obio_get_resource_list), 482 DEVMETHOD(bus_hinted_child, obio_hinted_child), 483 DEVMETHOD(bus_release_resource, obio_release_resource), 484 DEVMETHOD(bus_setup_intr, obio_setup_intr), 485 DEVMETHOD(bus_teardown_intr, obio_teardown_intr), 486 DEVMETHOD(device_attach, obio_attach), 487 DEVMETHOD(device_probe, obio_probe), 488 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 489 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 490 491 {0, 0}, 492 }; 493 494 static driver_t obio_driver = { 495 "obio", 496 obio_methods, 497 sizeof(struct obio_softc), 498 }; 499 static devclass_t obio_devclass; 500 501 DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);
Cache object: 4de010cdcdd6fef7a2ad3544641b10b9
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